"Optional feature not implenented"

[dwa]

I'm trying to insert a record into a table using Jet 4.0 with ADO (from a
C++ app) and I keep getting the error

"Optional feature not implemented"

There is nothing special I can see about the table or any of the parameters.
What might this mean?

Here's the query:

"insert into "
" patient( id,dob,height,weight,occupation,gender,glulow,gluhigh, "
" before_breakfast,
after_breakfast,before_lunch,after_lunch,before_dinner, "
" after_dinner,before_bedsnack,after_bedsnack,night_time,group_id) "
"values "
" (?,?,?,?,?,?,?,?, "
" ?, ?,?,?,?, "
" ?,?,?,?,?) ";

Here's a log of the parameters being passed in:

27,
1/1/1900,
0,
0,
,
0,
20,
600,
6:00:00 AM,
8:00:00 AM,
11:00:00 AM,
1:00:00 PM,
5:00:00 PM,
7:00:00 PM,
9:00:00 PM,
11:00:00 PM,
11:00:00 PM,
22